NEW YORK (AP) – Severe thunderstorms across the Northeast have slowed operations at airports, wreaked havoc at outdoor sporting and musical events and sent people scurrying from a beach in New York after three men there were struck by lightning.

The Fire Department of New York says the men were injured at Orchard Beach on Pelham Bay in the Bronx on Sunday as storms rolled through the area. The men are being treated at a hospital. The extent of their injuries is unknown.

Torrential rain, thunder and lightning interrupted Labor Day weekend celebrations in Philadelphia, where a parkway hosting the Made in America music concert was evacuated for safety reasons.

The bad weather also forced the early end to the Electric Zoo musical festival in New York and halted play at the U.S. Open tennis tournament.